Combined reading and indirect room-lighting lamp



May 27, 1924. F. c. BAKER COMBINED READING AND INDIRECT ROOM LIHTING LAMP Filed June '7, 1922 rannnnrox 0. Ba, orroa'rnan'n, oaneoar.

coranmnn me AND mmancr mom-nen'rme r.

Application filed June 7,

Y Y To all whom it ma concern:

Be it lmown that FREDERICK C; BAKER, a citizen of the United States, and a resident of Portland, county of Multnomah and State of Oregon, have invented a-new and useful Improvement in Combined Reading and Indirect Room-Lighting Lamps, of which the following is a specification.

The object of my invention is to provide a reading lamp which will also serve to illuminate substant'ally the whole room.

In order to attain these results I have concluded that the reading light should be transmitted thru a translucent shade or bowl of semi spherical form, preferably of glass,

so as to remove all tiring glare; and the interior surface of this shade must function as a reflector for throwing the light rays upward against the ceiling and broadcasting them laterally, thus 'bringingabout the indirect illumination of the-whole room. The translucent bowl encompassing the 'li ht globe I encompass by an outer semi-trans uspaced a substantial distance from the walls of the translucent bowl, so as not to contract the circle of upwardly, northe downwardly projected light rays, which contraction would tend to render the lamp'inefiicient for the efiicient indirect lighting of the room, as wellas for reading purposes. 'Furtherfiiore, the outer shade must be of such height as to conceal or screen completely the translucent bowl, that is, extending a substantial distance below, and slightly above the latter, in

, this way, as mentioned, efl'ectively screening the room more effective. An advantage Lof;

all bright rays from those in the room not using the lamp for reading, and at the same time rendering the indirect illumination of my lamp is that a high power lamp globe may be used, thus providing an efiicient source for indirect illumination of the room at the same time reducing the downwardly 1922. Serial at. 586,531.

projected raysnby the construction referred I to, to an evenly diffused soft light directly around the lamp, as is desirable for reading pur oses.

y lamp is arranged as illustrated in the accompanying drawings, in which:

Fig. 1 represents a stand lamp embod ing my invention, the rays of light emitte being represented by the arrows;

Fig. 2 is a vertical section taken thru the lamp socket and supporting parts of the latter, the translucent bowl of my lamp also showing in part the radial arms constituting a partof the frame supporting the outer shade of my lamp, and the directions of the 7 light rays are indicated by the arrows;

Fig. 3 is a top view of my lamp; and Fig. 4 is a fragmentary side elevation of an alternative means for supporting the auxiliary shade.v

On 'the stand a is mounted a socket 6 containing the light socket c. In the socket b is secured a ring at and in -the latter; is secured the base of the translucent bowl :2" said base being provided with a concaved rim as shown in Fig. 2. 7 represents anelectric light globe of any convenient power. The translucent bowle is of semi-spherical form and its interior surface may be glazed so as to be better adapted to reflect the light rays upwardly and laterally as diagrammatically indicated by the-'- arrows in Figs. 1 find 2., The translucent bowl ea and the light ulbother that the former-screens the light'but are so relatively arranged to each permits the projection of light rays at wide angles, over the top of the bowl. 9 is a second or outer shade. This is preferably made of semi-translucent material for example fabric which may also be more or "less ornamental. The outer shade is supported by a frame fixed on the base of the translucent bowl e and consists of radial arms h connecting at the to with a ring '5; the top of the auxiliary sha e being secured to the top of he ring 5.

But this 'f me can be made and attached in many other different ways, one of which isshown in Fig. 4. The skeleton frame 0 is made with fingers 1 adapted to fitover I the top or upper edge e. of the bowl e. The upper edge e may be fluted or notched as at-m in which the fingers Z can be firmly seated.

The outer shade is made of such helght aeto extend a su tantial distance below the bowl c and a suficient distance above the latter so as to conceal or screen the bowl completely but not to intercept any of the light rays which are projectedover its top. Furthermore the concentric walls of the bowl and the outer shade should be spaced a substantial distance apart, or in other words, the outer shade 9' made of such diameter as not to contract the circle of the upwardly or downwardly projected light ra s WhlCh are to be utilized for indirect lighting of the room or reading purposes.

A convenient and eficient arrangement of the parts is shown by Fig. 1 from. which it will be noted that the top or upper edge e of the translucent bowl 6 extends above the source of light, the top or upper edge of said shade 9 extends above the bowl, and the source of light lies slightly below any line grazing the-upper edge of the howl and the upper edge of the shade. Such cooperative relation of said elements assures that the light rays laterally projected over the top of the bowl 6, as indicated by the ar- 25 rows 7' in Fig. 1, will not be intercepted. In other words, the arts are so relatively arranged that all lig t rays which pass laterally over the top of the translucent bowl e will also be permitted to pass freely over the top of the outer shade g. The function of the latter shade is to screen the stronger light from all persons in the room not using manner the lamp for reading purposes and thus sitting approximately under the lamp in this a way enhancing the indirect ditlused illumination produced b the light rays upwardly and laterally pro ected against the ceiling of the room.

In the operation of my lamp it has been customary to use a translucent bowl that allows about one fourth of the light ot' the light bulb to filter thru downwardly and the other three fourths to be reflected upwards. lln many installations it has been found that by my lamp it is ossible to eliminate overhead chandeliers cause of the ver eficient ceiling reflection obtained by my amp.

I claim:

A. lamp comprising a semi-spherical translucent bowl, a source of light located axially within said bowl and completely concealed by the latter, the downwardly projected rays of such light being intercepted by and transmitted through said bowl, a semi- Gil translucent shade spaced from and encornpassing concentrically said bowl, and completely concealing the latter, the top of said bowl extending above the light source, the top of said shade extending above the bowl, and the source of light lying slightly below any line grazing the u per edge of the bowl and the u pier edge 0 the shade. Fh DERlCK C, BAKER,

till 

